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GET /api/patches/2211264/?format=api
{ "id": 2211264, "url": "http://patchwork.ozlabs.org/api/patches/2211264/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260316104209.1285962-5-poros@redhat.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260316104209.1285962-5-poros@redhat.com>", "list_archive_url": null, "date": "2026-03-16T10:42:09", "name": "[iwl-next,4/4] iavf: harden VLAN filter state machine race handling", "commit_ref": null, "pull_url": null, "state": "under-review", "archived": false, "hash": "5768f571384f9b9c2e6d813973db5e4611ae4aa4", "submitter": { "id": 74657, "url": "http://patchwork.ozlabs.org/api/people/74657/?format=api", "name": "Petr Oros", "email": "poros@redhat.com" }, "delegate": { "id": 109701, "url": "http://patchwork.ozlabs.org/api/users/109701/?format=api", "username": "anguy11", "first_name": "Anthony", "last_name": "Nguyen", "email": "anthony.l.nguyen@intel.com" }, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/20260316104209.1285962-5-poros@redhat.com/mbox/", "series": [ { "id": 496040, "url": "http://patchwork.ozlabs.org/api/series/496040/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/list/?series=496040", "date": "2026-03-16T10:42:06", "name": "iavf: fix VLAN filter state machine races", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/496040/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2211264/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2211264/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=osuosl.org header.i=@osuosl.org header.a=rsa-sha256\n header.s=default header.b=5AXzCiny;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=osuosl.org\n (client-ip=2605:bc80:3010::138; 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client-ip=170.10.129.124;\n helo=us-smtp-delivery-124.mimecast.com; envelope-from=poros@redhat.com;\n receiver=<UNKNOWN>", "DMARC-Filter": "OpenDMARC Filter v1.4.2 smtp3.osuosl.org ED6C960DEA", "X-MC-Unique": "54-iBjSePL26S8rctg4q0A-1", "X-Mimecast-MFC-AGG-ID": "54-iBjSePL26S8rctg4q0A_1773657754", "From": "Petr Oros <poros@redhat.com>", "To": "netdev@vger.kernel.org", "Date": "Mon, 16 Mar 2026 11:42:09 +0100", "Message-ID": "<20260316104209.1285962-5-poros@redhat.com>", "In-Reply-To": "<20260316104209.1285962-1-poros@redhat.com>", "References": "<20260316104209.1285962-1-poros@redhat.com>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.111", "X-Mimecast-MFC-PROC-ID": "Fv0ZFxJ-8JN6LJRn0pugArUdPKDXL0svkaa7uQX-EHE_1773657754", "X-Mimecast-Originator": "redhat.com", "Content-Transfer-Encoding": "8bit", "content-type": "text/plain; charset=\"US-ASCII\"; x-default=true", "X-Mailman-Original-DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed;\n d=redhat.com;\n s=mimecast20190719; t=1773657759;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:content-type:content-type:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=TcCvlNKS2FtWNY/zDB/0qSw6naZ8LMZekz/Sa7hhVBQ=;\n b=S75+5bYgh7GeuQUeMSXnAfl6iqAcO09i4IaJI5vej6uDHxQiqaYjtSfGG3IL5mLuaqMw/e\n B8wThpmMDYJQl5g5TxE9Id3gVuEfXtgLd/Oj4T0QogBIIY1eiRt4tEJsXlhC7puwF0iXQp\n yViE3rTSK81SmkwIz95ST4NEr1juTFM=", "X-Mailman-Original-Authentication-Results": [ "smtp3.osuosl.org;\n dmarc=pass (p=quarantine dis=none)\n header.from=redhat.com", "smtp3.osuosl.org;\n dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com\n header.a=rsa-sha256 header.s=mimecast20190719 header.b=S75+5bYg" ], "Subject": "[Intel-wired-lan] [PATCH iwl-next 4/4] iavf: harden VLAN filter\n state machine race handling", "X-BeenThere": "intel-wired-lan@osuosl.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n <intel-wired-lan.osuosl.org>", "List-Unsubscribe": "<https://lists.osuosl.org/mailman/options/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@osuosl.org?subject=help>", "List-Subscribe": "<https://lists.osuosl.org/mailman/listinfo/intel-wired-lan>,\n <mailto:intel-wired-lan-request@osuosl.org?subject=subscribe>", "Cc": "Przemek Kitszel <przemyslaw.kitszel@intel.com>,\n Eric Dumazet <edumazet@google.com>, linux-kernel@vger.kernel.org,\n Andrew Lunn <andrew+netdev@lunn.ch>,\n Tony Nguyen <anthony.l.nguyen@intel.com>,\n intel-wired-lan@lists.osuosl.org, jacob.e.keller@intel.com,\n Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,\n \"David S. Miller\" <davem@davemloft.net>", "Errors-To": "intel-wired-lan-bounces@osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@osuosl.org>" }, "content": "Address remaining race windows in the VLAN filter state machine that\nwere identified during cross-state analysis of ADD and DEL paths.\n\n1. Add VIRTCHNL_OP_ADD_VLAN to the success completion handler.\n\n The V1 ADD_VLAN opcode had no success handler -- filters sent via V1\n stayed in ADDING state permanently. Add a fallthrough case so V1\n filters also transition ADDING -> ACTIVE on PF confirmation.\n\n Critically, add an `if (v_retval) break` guard: the error switch\n in iavf_virtchnl_completion() does NOT return after handling errors,\n it falls through to the success switch. Without this guard, a\n PF-rejected ADD would incorrectly mark ADDING filters as ACTIVE,\n creating a driver/HW mismatch where the driver believes the filter\n is installed but the PF never accepted it.\n\n For V2, this is harmless: iavf_vlan_add_reject() in the error\n block already kfree'd all ADDING filters, so the success handler\n finds nothing to transition.\n\n2. Skip DEL on filters already in REMOVING state.\n\n In iavf_del_vlan(), if a filter is in IAVF_VLAN_REMOVING (DEL\n already sent to PF, waiting for response), do not overwrite to\n REMOVE and schedule a redundant DEL. The pending DEL's\n completion handler will either kfree the filter (PF confirms)\n or revert to ACTIVE (PF rejects).\n\n Without this, the sequence DEL(pending) -> user-del -> second DEL\n could result in PF returning an error for the second DEL (filter\n already gone), causing the completion handler to incorrectly revert\n a deleted filter back to ACTIVE.\n\nSigned-off-by: Petr Oros <poros@redhat.com>\n---\n drivers/net/ethernet/intel/iavf/iavf_main.c | 5 ++++-\n drivers/net/ethernet/intel/iavf/iavf_virtchnl.c | 4 ++++\n 2 files changed, 8 insertions(+), 1 deletion(-)", "diff": "diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c b/drivers/net/ethernet/intel/iavf/iavf_main.c\nindex 89e5aae20d5573..1ffc0ce3f35602 100644\n--- a/drivers/net/ethernet/intel/iavf/iavf_main.c\n+++ b/drivers/net/ethernet/intel/iavf/iavf_main.c\n@@ -816,11 +816,14 @@ static void iavf_del_vlan(struct iavf_adapter *adapter, struct iavf_vlan vlan)\n \t\t\tlist_del(&f->list);\n \t\t\tkfree(f);\n \t\t\tadapter->num_vlan_filters--;\n-\t\t} else {\n+\t\t} else if (f->state != IAVF_VLAN_REMOVING) {\n \t\t\tf->state = IAVF_VLAN_REMOVE;\n \t\t\tiavf_schedule_aq_request(adapter,\n \t\t\t\t\t\t IAVF_FLAG_AQ_DEL_VLAN_FILTER);\n \t\t}\n+\t\t/* If REMOVING, DEL is already sent to PF; completion\n+\t\t * handler will free the filter when PF confirms.\n+\t\t */\n \t}\n \n \tspin_unlock_bh(&adapter->mac_vlan_list_lock);\ndiff --git a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c\nindex d0b7b810679399..147adb76f64141 100644\n--- a/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c\n+++ b/drivers/net/ethernet/intel/iavf/iavf_virtchnl.c\n@@ -2877,9 +2877,13 @@ void iavf_virtchnl_completion(struct iavf_adapter *adapter,\n \t\tspin_unlock_bh(&adapter->adv_rss_lock);\n \t\t}\n \t\tbreak;\n+\tcase VIRTCHNL_OP_ADD_VLAN:\n \tcase VIRTCHNL_OP_ADD_VLAN_V2: {\n \t\tstruct iavf_vlan_filter *f;\n \n+\t\tif (v_retval)\n+\t\t\tbreak;\n+\n \t\tspin_lock_bh(&adapter->mac_vlan_list_lock);\n \t\tlist_for_each_entry(f, &adapter->vlan_filter_list, list) {\n \t\t\tif (f->state == IAVF_VLAN_ADDING)\n", "prefixes": [ "iwl-next", "4/4" ] }